In a microwave oven, the wave produced has a wavelength of 12 cm at a frequency of:
Correct answer: A. 2.45 GHz
- A. 2.45 GHz
- B. 2452 Hz
- C. 2456 Hz
- D. 2455 Hz
Explanation
The electromagnetic waves used in a microwave oven have a frequency of 2.45 x 10° Hz.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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About Electromagnetic Waves
Electromagnetic waves consist of mutually perpendicular, oscillating electric and magnetic fields that also remain perpendicular to the direction of propagation. They travel through vacuum at the speed of light and include radio waves, microwaves, infrared, visible, ultraviolet, X-rays and gamma rays. Unlike mechanical waves, they do not require a material medium.
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